BaseFortify

Publication date: 2026-01-22

Last updated on: 2026-02-02

Assigner: Microsoft Corporation

Description

Improper neutralization of escape, meta, or control sequences in Copilot allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-01-22

Last Modified

2026-02-02

Generated

2026-07-06

AI Q&A

2026-01-23

EPSS Evaluated

2026-07-05

NVD

CVE-2026-21521

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_word_copilot	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-150	The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as escape, meta, or control character sequences when they are sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper neutralization of escape, meta, or control sequences in Copilot, which allows an unauthorized attacker to disclose information over a network.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive information over a network, potentially exposing confidential data to attackers.

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